7055铝合金的化学成分、物相组成及其性能特点

说明了7055合金中Zn、Cu、Mg、Si、Fe和Zr等元素在该合金中的作用或影响;阐述了该合金的物相组成和-αAl、η（MgZn2）、S（Al2CuMg）、T（Al2Zn3Mg2）以及Al3Zr的作用;讲解了基体沉淀相（MPt）、晶界沉淀相（GBP）和晶间无析出带宽度（PFZ）对该合金性能的影响,介绍了该合金的性能特点进而介绍了该合金晶界腐蚀、应力腐蚀和剥落腐蚀的产生机理。总结了该合金化学成分、物相组成与宏观性能的对应关系。     

微波辅助燃烧合成FeCoNiCuAl高熵合金的组织与性能

基于高熵合金的成分设计理念,利用铝热反应机制,以氧化物粉末为原料,采用微波辅助燃烧合成法,制备了块体FeCoNiCuAl高熵合金,试验了一种高熵合金制备的新方法.研究了该合金的微观结构和性能,结果表明:该合金的组织是典型的树枝晶;该合金具有简单的体心立方和面心立方结构;Fe、Co、Ni、Al四种元素分布比较均匀,Cu倾...     

Cu-Ni-Ti电极合金最佳时效工艺的研究

研究了不同的时效工艺对Cu-Ni-Ti电极合金性能的影响。结果表明:该合金固溶处理后,经适当的时效处理,可有效地提高合金的导电率、强度和硬度;确定了该合金的最佳时效工艺并分析了时效硬化的原因。     

Cu-Zn-Al合金生产应用的热处理工艺研究

本文着重研究了Cu-Zn-Al合金α+β区淬火加低温时效、β区淬火加低温时效及冷变形加低温时效三种热处理工艺对Cu-Zn-Al合金组织和性能的影响,确定了该合金在工业化生产应用时比较适合的热处理工艺。并发现冷变形加低温时效热处理工艺不仅能极大地提高该合金的抗拉强度,且能使该合金保持较高的伸长率。     

銀铈电接点材料的研究

制备了一种含微量稀土铈的银铈合金。研究了铈对合金基本性能的影响。用热重分析(TG)法研究了铈对合金氧化特性的影响。用该合金作为电接点材料进行了生产考核实验,发现该合金具有优良的导热性、导电性、接触电阻小而稳定、有一定的灭弧能力和有益的氧化特性。特别是微量铈的添加,使该合金具有特别优异的抗熔焊特性;并用分光分析实验初步探讨了合金在电弧作用下的物理化学过程。     

硅锰—碳化硅脱氧合金化工艺在转炉炼钢中的应用

本文介绍了采用硅锰—碳化硅脱氧合金化工艺的意义和其工艺的可行性,介绍了转炉冶炼20MnSi采用硅锰—碳化硅脱氧合金化的工艺设计过程,分析了该工艺合金消耗、合金吸收率、碳的控,钢种命中率及对钢质量的影响,通过计算合金化工艺的成本,分析了采用该工艺的经济效益,并提出了该工艺在生产实际过程中尚待解决的问题。     

铬锆铜电极合金产生细裂纹问题的研究

本文采用SEM、EMP、x-ray衍射等测试技术,对铬锆铜电极合金作了比较系统的研究,分析了该合金的微观组织与热处理温度、时间、气氛之间的关系,找出了铬锆铜电极合金产生表面细裂纹的原因及解决办法,对该合金的生产和开发有一定的价值。     

耐应力腐蚀的铁-镍-铬合金

位于美国西弗吉尼亚Hungington的特殊金属公司（Special Metal Corp．）开发出了一种镍基沉淀硬化合金,该合金称之为Incoloy 945,合金的最低屈服强度为860MPa（125ksi）,并具有良好的冲击韧性。该合金是一种时效硬化镍-铁-铬合金,在该合金中添加了钼,铜,铌,钛和铝。     

航空发动机火焰探测器用GH747高温合金

研制出一种用于制造航空发动机火焰探测器的新型高温合金GH747.该合金的抗氧化性、高温组织稳定性等明显优于国外该部件所用合金,能够在1 200℃以上温度正常使用.在国内目前的高温抗氧化合金中,该合金不仅抗氧化性能极为优良,而且比重小、高温强度高、塑性好、材料成本低.因此,该合金在航空发动机制造领域具有非常好的应用前景.     

电沉积泡沫Ni-Mo合金

以聚氨酯泡沫树脂为基体,采用化学镀、电沉积、热解和氢气还原的方法制备出网状结构的泡沫Ni-Mo合金。对该泡沫合金的形貌、镀液组分与合金组分的关系和合金的抗拉强度、抗腐蚀性、高温抗氧化性进行了分析研究。试验结果表明:合金中Mo含量随着Na2MoO4浓度增加而增加,该泡沫合金骨架平整,泡沫Ni-Mo合金抗拉强度、耐腐蚀性和高温抗氧化性优于泡沫镍,在中性盐雾试验中的抗腐蚀性加强,高温抗氧化性也增强。     

Magnetocaloric Effect of Ni56Mn18.8Ga24.5 Gd0.7 Alloy

Inrecent years materials with high magnetocaloriceffect (MCE) have attracted considerable attention ow-ingto its potential application as a magnetic refriger-ant .Many material systemsthat underwentthefirst-or-der magnetic transition have been found to exhibit agiant MCE. Their typical representatives areGd5(SixGe1 -x)4[1 ,2]and La (FexSi1 -x)13[3 ,4]alloys .Ni MnGa is aferromagnetic shaped memory alloy whichundergoes a reversible first-order structural phase tran-sition (SPT) with the …     

软磁合金系列新产品的开发

选择了应用广、技术含量高、磁特性不同1J50、1J22三种合金作软磁合金系列新产品开发的代表。试制中重点解决了真空冶金工艺及最佳合金成分匹配，提高返回比和宽带生产技术。试制结果表明，合金的冶金质量、磁性能、尺寸公差均达到国标要求。     

Effects of Magnetic Heat Treatment on Magnetostiction Properties of Tb0.3 Dy0.7 Fe1.95 Alloy

The effects of magnetic heat treatment on magnetostriction properties of Tb0.3Dy0.7Fe1.95 alloy were investigated.The directionally solidified alloy was heated to various temperatures near Curie temperature TC in vacuum, kept for a certain time under the application of magnetic field and then cooled to room temperature.The magnetostriction coefficient was measured by a resistance strain gage.The crystal structure was analyzed by X-ray diffraction (XRD).The experimental results show that the magnetostriction coefficient obviously increases and the grains orientations along the axis changed somewhat as the field of 1 T vertical to axis of the rod-shaped specimen is applied for 5 min at the heating temperature slightly lower than TC.     

Research status and future development trend of a novel FeSiBPCu nano soft magnetic alloy

The iron- based nano- soft magnetic alloy is applied to many magnetic components such as choke coils and transformers due to its excellent soft magnetic properties such as high saturation magnetic induction, low coercivity and low loss, which has attracted widely attention. Firstly, the research progress of traditional nano soft magnetic alloy and new FeSiBPCu nano soft magnetic alloy is elaborated??and the exploration of nano- soft magnetic alloys by some researchers at home and abroad was introduced. Then, compare the new FeSiBPCu nano- soft magnetic alloy with traditional nano- soft magnetic alloy, its advantages and disadvantages were listed. The progress and current status of some extended research on new FeSiBPCu nano- soft magnetic alloy to deal with these disadvantages was introduced. Finally, the future development of this new nano soft magnetic alloy was prospected.     

La_(1.1)Fe_(11.4)Si_(1.55)Ge_(0.05)合金的磁热效应

使用电弧熔炼法制备了La1.1Fe11.4Si1.55Ge0.05合金。研究了用少量的Ge替代Si后,La1.1Fe11.4Si1.55Ge0.05合金的磁性和磁热效应。粉末X射线衍射结果表明:在1273K真空退火处理10d后,合金La1.1Fe11.4Si1.55Ge0.05主相为NaZn13型立方结构,存在微量的α-Fe相。热磁曲线M-T与Arrott曲线表明:在居里温度Tc=205K处发生由铁磁性(TTc)转变为顺磁性(TTc)的二级磁相变。在磁场变化0～1.5T下,根据等温磁化曲线通过Maxwell关系式计算得出最大磁熵变-ΔSmmax=9J.kg-.1K-1。Ge替代Si后该合金在其居里温度Tc处-ΔSm-T曲线半高宽增大,使合金的相对制冷能力RCP(S)有所提高。     

钼对耐蚀软磁合金抗蚀性及磁性能的影响

 Fe Cr系软磁合金是一种抗蚀软磁材料。在Fe 13%Cr和Fe 17%Cr中添加不同含量的钼，对合金的抗点蚀、盐雾腐蚀、浸泡腐蚀以及大气腐蚀的能力和相应的磁性能进行了系统、全面的研究。结果表明，在这两种软磁合金中加入质量分数为20%和30%的钼，可明显提高合金的耐蚀能力；合理控制钼含量和采用相应的热处理工艺对合金磁性能的影响并不明显。     

磁场退火对Fe80Si9B11非晶合金的磁致伸缩特性影响

摘要：利用激光多普勒法测量50Hz下非晶合金带材的磁致伸缩曲线,研究了磁场退火对Fe80Si9B11非晶合金带材的磁致伸缩特性的影响。结果显示,在相同的磁场强度下非晶带材经横磁退火后磁致伸缩最大,无磁场退火次之,纵磁退火时最小。然后,采用Kerr方法观察了非晶合金带材的磁畴形貌,从微观结构上解释了经不同磁场退火后磁致伸缩大小不同的机理。最后,对无磁场退火、横磁退火和纵磁退火后的Fe80Si9B11铁基非晶合金铁芯进行了噪音测试。结果显示,在相同的频率和磁通密度下,非晶合金铁芯经横磁退火后噪音最大,无磁场退火次之,纵磁退火时噪音最小,与非晶合金带材经不同磁场热处理后磁致伸缩大小的规律一致。为解决非晶合金铁芯在实际应用中的噪音问题提供了参考。     

热处理温度对铝钢复合板界面组织和性能的影响

摘要：利用激光多普勒法测量50Hz下非晶合金带材的磁致伸缩曲线,研究了磁场退火对Fe80Si9B11非晶合金带材的磁致伸缩特性的影响。结果显示,在相同的磁场强度下非晶带材经横磁退火后磁致伸缩最大,无磁场退火次之,纵磁退火时最小。然后,采用Kerr方法观察了非晶合金带材的磁畴形貌,从微观结构上解释了经不同磁场退火后磁致伸缩大小不同的机理。最后,对无磁场退火、横磁退火和纵磁退火后的Fe80Si9B11铁基非晶合金铁芯进行了噪音测试。结果显示,在相同的频率和磁通密度下,非晶合金铁芯经横磁退火后噪音最大,无磁场退火次之,纵磁退火时噪音最小,与非晶合金带材经不同磁场热处理后磁致伸缩大小的规律一致。为解决非晶合金铁芯在实际应用中的噪音问题提供了参考。     

Effect of 0·5 mass% Cu Addition on Ductility and Magnetic Properties of Fe-6·5Si Alloy

The effect of adding 0.5mass% Cu on ductility and magnetic properties of Fe-6.5Si(mass%)alloy was investigated.The alloys with and without 0.5mass% Cu addition were warm rolled into thin sheets of thickness no more than 0.3mm at temperature below 600 ℃.It was found that the alloy with 0.5mass% Cu addition was more easily warm rolled than Cu-free alloy.Tensile tests were carried out to further investigate this phenomenon,which confirmed that the ductility of the alloy with 0.5mass% Cu addition was significantly higher than that of Cu-free alloy at 550 ℃.Based on the results of transmission electron microscopy analysis,the ductility increase of the alloy with 0.5mass% Cu addition was attributed to the effect of Cu on the promotion of dynamic recovery and suppression of long-range order in the alloy during warm rolling process.It was also observed that the iron loss was lower and inductance was higher for the alloy with 0.5 mass% Cu addition.Thus,it can be concluded that adding a suitably small amount of Cu would not only increase the ductility of Fe-6.5Si alloy at warm rolling temperatures but also improve its magnetic properties.     

Research progress on Finemet- type alloy with high saturation magnetic induction

Finemet type alloys attract a large number of scholars at home and abroad to study them due to their excellent soft magnetic properties such as high magnetic permeability, low loss and small magnetostriction coefficient. The structure and magnetic properties of Finemet type alloys were introduced and compared with other typical soft magnetic materials. The research work on improving the soft magnetic high saturation magnetic induction intensity of Finemet type alloy at home and abroad was reviewed, and the suggestions for future research directions were put forward.